JSFiddle - React, Tailwind, and code Playground

HTML

<select>
    <option>Hello World</option>
</select>

CSS

select {
    border: 2px solid blue;
    padding: 5px 10px;
    /* Reset background color in Firefox: */
    background: white;
    /* Reset rounded corners in Webkit: */
    border-radius: 0;
    /* Remove arrow: */
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}
select::-ms-expand {
    display: none;
}